Well, the answer is the song called Aeris's Theme or earisunotema, and what you hear in World Crisis is not a song, but more like a motif or even a theme itself, but it's not a song. I mean, it's not a song until you play the whole track. The 'master' did derive that part of the song from Aeris's theme, though, much like he does later several times in the piece. "Baaaa ba ba diiii daaa!"

Yeah, I didn't think of that, but it wasn't enough of a confusion to stop PA from solving the riddle.

Oh, PA, since we solved your other riddle, do you want to start writing new ones now? Or, do you want someone else to write one?